The Claim

Resistance training is associated with moderate increases in fat-free mass, with a within-study effect size of 0.24, indicating that it consistently promotes skeletal muscle hypertrophy in adults who participate in structured training programs.

Source: Resistance training, skeletal muscle hypertrophy, and glucose homeostasis: how related are they? A Systematic review and Meta-analysis.

What the research says

Supports is higher

Support is ahead, but a single strong opposing study can change this.

Supports
46score
Challenges
0score

These are independent scores, not a percentage. Higher-grade studies count more, so a single strong opposing study can outweigh several weaker ones.

Quantitative
1 study reviewed
In plain English

Lifting weights helps adults gain muscle — studies show it consistently leads to modest muscle growth when done regularly.

See the scientific wording

Resistance training is associated with moderate increases in fat-free mass, with a within-study effect size of 0.24, indicating that it consistently promotes skeletal muscle hypertrophy in adults participating in structured training programs.

What the research says

1 study

  1. Study: Resistance training, skeletal muscle hypertrophy, and glucose homeostasis: how related are they? A Systematic review and Meta-analysis.

    The study looked at resistance training and found that it really does help people gain muscle, with a clear effect size that matches exactly what the claim says.

Score breakdown, mechanism chain, raw evidence, ideal studies needed & 1 supporting studies

Fit Body Science verdict — we translate health claims into clear verdicts backed by peer-reviewed research.

Not medical advice. For informational purposes only. Always consult a qualified healthcare professional before making health decisions.